aoc_3

Cargo.toml

@@ -13,3 +13,8 @@ harness = false
 [[bench]]
 name = "bench_aoc_2"
 harness = false
+[[bench]]
+name = "bench_aoc_3"
+harness = false
+[dependencies]
+strength_reduce = "0.2.4"

benches/bench_aoc_1.rs

@@ -14,7 +14,14 @@ fn bench_aoc_1_part2(c: &mut Criterion) {
 
 fn bench_aoc_1_part2_f(c: &mut Criterion) {
     let input = black_box(include_bytes!("../src/aoc/input/full_input_aoc1.txt"));
-    c.bench_function("bench_aoc2 part fast", |b| b.iter(|| aoc_1::solve_2f(input)));
+    c.bench_function("bench_aoc2 part fast", |b| {
+        b.iter(|| aoc_1::solve_2f(input))
+    });
 }
-criterion_group!(benches_p1, bench_aoc_1_part1, bench_aoc_1_part2, bench_aoc_1_part2_f);
+criterion_group!(
+    benches_p1,
+    bench_aoc_1_part1,
+    bench_aoc_1_part2,
+    bench_aoc_1_part2_f
+);
 criterion_main!(benches_p1);

benches/bench_aoc_2.rs

@@ -7,10 +7,29 @@ fn bench_aoc_2_part1(c: &mut Criterion) {
     c.bench_function("bench_aoc2 part 1", |b| b.iter(|| aoc_2::solve_p1(input)));
 }
 
+fn bench_aoc_2_part1_f(c: &mut Criterion) {
+    let input = black_box(include_str!("../src/aoc/input/full_input_aoc2.txt"));
+    c.bench_function("bench_aoc2 part 1 fast", |b| {
+        b.iter(|| aoc_2::solve_p1_unsafe(input))
+    });
+}
+fn bench_aoc_2_part1_faster(c: &mut Criterion) {
+    let input = black_box(include_bytes!("../src/aoc/input/full_input_aoc2.txt"));
+    c.bench_function("bench_aoc2 part 1 faster", |b| {
+        b.iter(|| aoc_2::solve_p1_bytes(input))
+    });
+}
+
 fn bench_aoc_2_part2(c: &mut Criterion) {
     let input = black_box(include_str!("../src/aoc/input/full_input_aoc2.txt"));
     c.bench_function("bench_aoc2 part 1", |b| b.iter(|| aoc_2::solve_p2(input)));
 }
 
-criterion_group!(benches_p2, bench_aoc_2_part1, bench_aoc_2_part2);
+criterion_group!(
+    benches_p2,
+    bench_aoc_2_part1,
+    bench_aoc_2_part1_f,
+    bench_aoc_2_part1_faster,
+    bench_aoc_2_part2
+);
 criterion_main!(benches_p2);

benches/bench_aoc_3.rs

@@ -0,0 +1,35 @@
+use aoc2025::aoc::aoc_3;
+use criterion::{Criterion, criterion_group, criterion_main};
+use std::hint::black_box;
+
+fn bench_aoc_3_part1(c: &mut Criterion) {
+    let input = black_box(include_bytes!("../src/aoc/input/full_input_aoc3.txt"));
+    c.bench_function("bench_aoc3 part 1", |b| b.iter(|| aoc_3::solve_p1(input)));
+}
+fn bench_aoc_3_part1_fast(c: &mut Criterion) {
+    let input = black_box(include_bytes!("../src/aoc/input/full_input_aoc3.txt"));
+    c.bench_function("bench_aoc3 part 1 fast", |b| {
+        b.iter(|| aoc_3::solve_p1_fast(input))
+    });
+}
+
+fn bench_aoc_3_part2(c: &mut Criterion) {
+    let input = black_box(include_bytes!("../src/aoc/input/full_input_aoc3.txt"));
+    c.bench_function("bench_aoc3 part 2", |b| b.iter(|| aoc_3::solve_p2(input)));
+}
+
+fn bench_aoc_3_part2_fast(c: &mut Criterion) {
+    let input = black_box(include_bytes!("../src/aoc/input/full_input_aoc3.txt"));
+    c.bench_function("bench_aoc3 part 2 fast", |b| {
+        b.iter(|| aoc_3::solve_p2_fast(input))
+    });
+}
+
+criterion_group!(
+    benches_p3,
+    bench_aoc_3_part1,
+    bench_aoc_3_part1_fast,
+    bench_aoc_3_part2,
+    bench_aoc_3_part2_fast
+);
+criterion_main!(benches_p3);

src/aoc.rs

@@ -1,2 +1,3 @@
 pub mod aoc_1;
 pub mod aoc_2;
+pub mod aoc_3;

src/aoc/aoc_1.rs

@@ -1,4 +1,3 @@
-
 pub fn solve_1(input: &'static [u8]) -> u64 {
     let mut dial = 50;
     let mut answer = 0;
@@ -15,7 +14,6 @@ pub fn solve_1(input :&'static[u8]) -> u64 {
             let ones = (line[2] & 0x0F) as i64;
             tens * 10 + ones
         } else {
-
             let tens = (line[2] & 0x0F) as i64;
             let ones = (line[3] & 0x0F) as i64;
             tens * 10 + ones
@@ -29,7 +27,9 @@ pub fn solve_1(input :&'static[u8]) -> u64 {
         if dial >= 100 {
             dial -= 100;
         }
-        if dial == 0 { answer += 1 }
+        if dial == 0 {
+            answer += 1
+        }
     }
     answer
 }
@@ -38,14 +38,16 @@ pub fn solve_1_f(input :&'static[u8]) -> u32 {
     let mut dial = 50;
     let mut answer = 0;
 
-
     for line in input.split(|&b| b == b'\n') {
         let len = line.len();
 
         let val = match len {
             2 => line[1] as i64 - 48,
             3 => 10 * line[1] as i64 + line[2] as i64 - 48 - 480,
-            _ => {answer+=line[1] as u32 - 48;  10 * line[2] as i64 +  line[ 3] as i64 - 48 - 480},
+            _ => {
+                answer += line[1] as u32 - 48;
+                10 * line[2] as i64 + line[3] as i64 - 48 - 480
+            }
         };
         if input[0] == b'R' {
             dial += val;
@@ -55,7 +57,9 @@ pub fn solve_1_f(input :&'static[u8]) -> u32 {
         if dial >= 100 {
             dial -= 100;
         }
-        if dial == 0 { answer += 1 }
+        if dial == 0 {
+            answer += 1
+        }
     }
     answer
 }
@@ -74,12 +78,14 @@ pub fn solve_2(input :&'static[u8]) -> u64 {
             let num = match bytes {
                 2 => input[index - 1] as i64 - 48,
                 3 => 10 * input[index - 2] as i64 + input[index - 1] as i64 - 48 - 480,
-                _ => {answer+=input[index-3] as u64 - 48;  10 * input[index -2] as i64 +  input[index -1] as i64 - 48 - 480},
+                _ => {
+                    answer += input[index - 3] as u64 - 48;
+                    10 * input[index - 2] as i64 + input[index - 1] as i64 - 48 - 480
+                }
             };
 
             match input[index - bytes] {
                 b'L' => {
-
                     if num > dial {
                         if dial != 0 {
                             answer += 1;
@@ -95,12 +101,9 @@ pub fn solve_2(input :&'static[u8]) -> u64 {
                             answer += 1;
 
                             dial = num + dial - 100;
-
                         } else {
                             dial = 0;
                         }
-
-
                     } else {
                         dial = num + dial;
                     }
@@ -128,13 +131,18 @@ pub fn solve_2f(input :&'static[u8]) -> u64 {
         let val = match len {
             2 => line[1] as i64 - 48,
             3 => 10 * line[1] as i64 + line[2] as i64 - 48 - 480,
-            _ => {answer+=line[1] as u64 - 48;  10 * line[2] as i64 +  line[ 3] as i64 - 48 - 480},
+            _ => {
+                answer += line[1] as u64 - 48;
+                10 * line[2] as i64 + line[3] as i64 - 48 - 480
+            }
         };
 
         if line[0] == b'L' {
             let next_dial = dial - val;
             if next_dial < 0 {
-                if dial != 0 { answer += 1; }
+                if dial != 0 {
+                    answer += 1;
+                }
                 dial = next_dial + 100;
             } else {
                 dial = next_dial;
@@ -143,7 +151,9 @@ pub fn solve_2f(input :&'static[u8]) -> u64 {
             // 'R' case
             let next_dial = dial + val;
             if next_dial >= 100 {
-                if next_dial != 100 { answer += 1; }
+                if next_dial != 100 {
+                    answer += 1;
+                }
                 dial = next_dial - 100;
             } else {
                 dial = next_dial;

src/aoc/aoc_3.rs

@@ -0,0 +1,131 @@
+pub fn solve_p1(input: &[u8]) -> u32 {
+    let mut answer = 0;
+    let mut i = 1;
+    let len = input.len();
+
+    while i < len {
+        let mut j = i;
+        let mut num = input[j-1];
+        let mut num2 = input[j];
+
+        while input[j+1] != 10 {
+
+            if input[j] > num {
+                num = input[j];
+                num2 = input[j + 1];
+            } else if input[j] > num2 {
+                num2 = input[j];
+            }
+            j +=1;
+            if j+2 == len {
+                break;
+            }
+
+        }
+
+        if input[j] > num2 {
+            num2 =input[j ];
+        }
+        answer += (((num - 48) * 10) + num2 - 48) as u32;
+
+        i = j + 3;
+    }
+
+    answer
+}
+
+pub fn solve_p1_fast(input: &[u8]) -> u32 {
+    let mut answer = 0;
+    let mut i = 1;
+    let len = input.len();
+
+    let mut num = input[0];
+    let mut num2 = input[1];
+    while i < len {
+        let mut j = i;
+        num = input[j-1];
+        num2 = input[j];
+
+        while input[j+1] != 10 {
+
+            if input[j] > num {
+                num = input[j];
+                num2 = input[j + 1];
+            } else if input[j] > num2 {
+                num2 = input[j];
+            }
+            j +=1;
+            if j+2 == len {
+                break;
+            }
+
+        }
+
+        if input[j] > num2 {
+            num2 =input[j ];
+        }
+        answer += (((num - 48) * 10) + num2 - 48) as u32;
+
+        i = j + 3;
+    }
+
+    answer
+}
+
+pub fn solve_p2(input: &[u8]) -> u64 {
+    let mut answer = 0;
+
+    for line in input.split(|&x| x == 10) {
+        let mut end = line.len() - 12;
+        let total = 12;
+        let mut start = 0;
+        let mut val = [0u8; 12];
+        for k in 0..total {
+            let mut num = line[start];
+            start += 1;
+            for i in start..=end {
+                if line[i] > num {
+                    num = line[i];
+                    start = i + 1;
+                }
+            }
+            val[k] = num;
+            end += 1;
+        }
+        let mut num = 0;
+        for i in 0..=11 {
+            num = num * 10 + (val[i] - 48) as u64;
+        }
+        answer += num;
+    }
+    answer
+}
+
+pub fn solve_p2_fast(input: &[u8]) -> u64 {
+    let mut answer = 0;
+
+    for line in input.split(|&x| x == 10) {
+        let mut end = line.len() - 12;
+        let total = 12;
+        let mut start = 0;
+        let mut val = [0u8; 12];
+        for k in 0..total {
+            let mut num = line[start];
+            start += 1;
+            for i in start..=end {
+                if line[i] > num {
+                    num = line[i];
+                    start = i + 1;
+                }
+            }
+            val[k] = num;
+            end += 1;
+        }
+        let mut num = 0;
+        for i in 0..=11 {
+            num = num * 10 + (val[i] - 48) as u64;
+        }
+        answer += num;
+    }
+    answer
+}

src/aoc/input/test_input_aoc3.txt

@@ -0,0 +1,4 @@
+987654321111111
+811111111111119
+234234234234278
+818181911112111

src/main.rs

@@ -1,35 +1,65 @@
-
-
 pub mod aoc;
 use crate::aoc::*;
 
 fn main() {
-    let input = include_str!("aoc/input/full_input_aoc2.txt");
+    let input = include_bytes!("aoc/input/full_input_aoc3.txt");
-    let answer = aoc_2::solve_p1(input);
+    let answer = aoc_3::solve_p1(input);
+    println!("{}", answer);
+    let input2 = include_bytes!("aoc/input/full_input_aoc3.txt");
+    let answer = aoc_3::solve_p1_fast(input2);
     println!("{}", answer);
-
-    let input = include_bytes!("aoc/input/test_input_aoc2.txt");
-    //let answer = aoc_2::solve_p1_f(input);
-    println!("{:?}", input);
 }
 
 #[test]
 fn test_aoc_1_1() {
-    assert_eq!(aoc_1::solve_1( include_bytes!("aoc/input/test_input_aoc1.txt")), 3);
+    assert_eq!(
-    assert_eq!(aoc_1::solve_1( include_bytes!("aoc/input/full_input_aoc1.txt")), 1195);
+        aoc_1::solve_1(include_bytes!("aoc/input/test_input_aoc1.txt")),
+        3
+    );
+    assert_eq!(
+        aoc_1::solve_1(include_bytes!("aoc/input/full_input_aoc1.txt")),
+        1195
+    );
 }
 
 #[test]
 fn test_aoc_1_2() {
-    assert_eq!(aoc_1::solve_2f(include_bytes!("aoc/input/test_input_aoc1.txt")), 6);
+    assert_eq!(
-    assert_eq!(aoc_1::solve_2f(include_bytes!("aoc/input/full_input_aoc1.txt")), 6770);
+        aoc_1::solve_2f(include_bytes!("aoc/input/test_input_aoc1.txt")),
+        6
+    );
+    assert_eq!(
+        aoc_1::solve_2f(include_bytes!("aoc/input/full_input_aoc1.txt")),
+        6770
+    );
 }
 
 #[test]
 fn test_aoc_2_part1() {
-    assert_eq!(aoc_2::solve_p1(include_str!("aoc/input/test_input_aoc2.txt")), 1227775554);
+    assert_eq!(
+        aoc_2::solve_p1(include_str!("aoc/input/test_input_aoc2.txt")),
+        1227775554
+    );
 }
 #[test]
 fn test_aoc_2_part2() {
-    assert_eq!(aoc_2::solve_p2(include_str!("aoc/input/test_input_aoc2.txt")), 4174379265);
+    assert_eq!(
+        aoc_2::solve_p2(include_str!("aoc/input/test_input_aoc2.txt")),
+        4174379265
+    );
+}
+
+#[test]
+fn test_aoc_3_part1() {
+    assert_eq!(
+        aoc_3::solve_p1(include_bytes!("aoc/input/full_input_aoc3.txt")),
+        17359
+    );
+}
+#[test]
+fn test_aoc_3_part2() {
+    assert_eq!(
+        aoc_3::solve_p2_fast(include_bytes!("aoc/input/full_input_aoc3.txt")),
+        172787336861064
+    );
 }